So I fixed my keyboard issue. Hastily way.
Since beginnings I had to press hard on several keys, wich is incompatible with a real use of the keyboard.
Mainly letters 'a', 'e', 'm', 'h' (and mny more)...are swallowed. But sometimes it has worked as expected (not often), and sometimes it's a real pain (often).
Average : a bad experience
Example with taping this as fast as possible :
"Les chiens aboient la caravane passe"
Ls cins aboint la caravan passe
Ls chiens aboint l crvane passe
Ls cins abint la caaravan pass
Digging into software doesn't help to find a workaround
I made an account just to say that just tightening the screws fixed most of my keyboard issues with my pro1! I was having issues with the m, e, d, l keys, but no longer! =D
Thanks for the write up! I'll post if I find out anything else
Edit, seems to be only a partial fix. I do still get double presses on the e and l still, but it is much much rarer!